This simulation shows wave interference from two point sources.[br][list][*]The gray bands represent wave crests. A and B are the two point sources.[/*][*]The slider can used to change the distance between the point sources. Separation can be varied from 0 to 4 wavelengths.[/*][*]Check the show points checkbox to display points labelled P and Q. These two points can be dragged to any position within the simulation. Two graphs also appear which show the resultant displacement at each position. [/*][/list]